Question

英语翻译硅是最有可能替代石墨的锂离子电池负极材料之一,因为硅具有容量大（生成Li4.4Si合金时为4200mAh/g）、

Answer 1

Silicon is the most likely alternative graphite anode materials of lithium ion batteries,because silicon has a large capacity (Li4.4Si alloy was 4200mAh / g ),lithium intercalation potential is low ( below 0.5V) and an electrolyte and has the advantages of low reaction activity.But the silicon particles in the insertion / extraction process generates intense volume change,making silicon particle powder electrode failure,rapid attenuation.Through the pyrolysis tar or polyvinyl chloride ( PVC ) preparing a silicon / carbon composite can significantly improve the cycle performance of material,the carbon to volume changes can effectively buffer,thereby inhibiting capacity attenuation,and the carbon has small volume expansion,good conductivity,light weight and so on are closely related.